We stayed at the CR in Feb in South Wing. Had a great time. We love the AKL, but even with our own car, it is "out there". With younger kids, you will probably go to MK the most. Cannot beat the ease of access.
I always read about the stark, boring motif of the CR. And the horrible decor of the rooms. We find it to be whimsical. I love the bright colors and odd shapes of the table, mirrors, vanities. Although the new pics of the rehab look very nice, I will miss the old retro "what the 70's view of contemporary looked like".
Anyway, our room in Feb overlooked Bay Lake and the pool. Very nice. No stains, mildew, etc. Room was very clean. We asked for non-smoking close to the main building. We were approximately 5 doors into the wing.
As for the AKL, I do that when it is just me and my best friend going. My kids (14 and 11) were with me about 4 years ago and loved seeing the animals for about 30 minutes. Then they did not even know they were there. My DH loves the theming, but rates it low on his list of resorts due to location.
Hope this helps!